21239984

素因数分解:

$2^4\times {\mathrm{823}}^1\times {\mathrm{1613}}^1$

素因数の和:2444

約数の個数: 20

約数和(自身を含む): 41228016

約数和(自身を除く): 19988032

約数列:

[1, 2, 4, 8, 16, 823, 1613, 1646, 3226, 3292, 6452, 6584, 12904, 13168, 25808, 1327499, 2654998, 5309996, 10619992, 21239984]

約数ペア:

[(1, 21239984), (2, 10619992), (4, 5309996), (8, 2654998), (16, 1327499), (823, 25808), (1613, 13168), (1646, 12904), (3226, 6584), (3292, 6452)]